Cant create any agents: ActionView::Template::Error (can't modify frozen String: ""):

[positivegossip]

I'm running the latest master branch on a Ubuntu Ubuntu 20.04 (LTS) x64 instance.

Running ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-linux-gnu]

When trying to create a new agent over the webpanel, I get a error message: "We're sorry, but something went wrong."

Checking Rails Application log /home/huginn/huginn/log/production.log returns the following:

[6112654e-7c91-4d34-96ba-694fc04ea4a9] ActionView::Template::Error (can't modify frozen String: ""):
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     25:           <% if @agent.new_record? %>
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     26:             <div class="form-group type-select">
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     27:               <%= f.label :type %>
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     28:               <%= f.select :type, options_for_select(agent_type_select_options, @agent.type), {}, class: 'form-control', autofocus: true %>
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     29:             </div>
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     30:           <% end %>
[6112654e-7c91-4d34-96ba-694fc04ea4a9]     31:         </div>
[6112654e-7c91-4d34-96ba-694fc04ea4a9]
[6112654e-7c91-4d34-96ba-694fc04ea4a9] (eval):2:in `new'
[6112654e-7c91-4d34-96ba-694fc04ea4a9] (eval):2:in `html_description'
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/helpers/agent_helper.rb:94:in `block (2 levels) in agent_type_select_options'
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/helpers/agent_helper.rb:94:in `map'
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/helpers/agent_helper.rb:94:in `block in agent_type_select_options'
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/helpers/agent_helper.rb:93:in `agent_type_select_options'
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/views/agents/_form.html.erb:28
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/views/agents/_form.html.erb:12
[6112654e-7c91-4d34-96ba-694fc04ea4a9] app/views/agents/new.html.erb:14
[6112654e-7c91-4d34-96ba-694fc04ea4a9] config/initializers/silence_worker_status_logger.rb:3:in `call'

Any idea how to fix this issue? Thank you.

[MarkStanhope]

I have the same problem, running on Ubuntu 20.04

[positivegossip]

I found out why this issue is happening.

The root cause fix is to upgrade rubygems. gem update --system

Specially foreman needs to be on the newest version.

[nkakouros]

I have the same issue and updating did not help.

[goodnewz]

I have the same issue and updating did not help.

So I had the same issue and moving to Ruby 2.6.6 did help me. See this comment for more details:

#2822 (comment)